Means for stopping the delivery of roving in spinning-machines



P.8HAHP. MEANS FOR STOPPING THE DELIVERY OF ROVING IN SPINNING MACHINES. APPLICATION mm m. 4. 1919.

1,304,610. Patented May 27, 1919,

3 SHEETS-SHEET I PJSHARP. I MEANS'FOB STOPPING THE DELIVERY OF ROVING IN SPINNING MACHINES. pgucmou mm FEB. 4; 1919.

3 SHEETS-SHEET 2- Patented May 27, 1919.

P.SHARPL MEANS FOR STOPPING THE DELIVERY OF ROVING IN SPINNING MACHINES. v

APPLICATION HLED "ma. 4. m9.

1,304,610. Patented May 27, 919.

3 SHEETS-SHEET 3.

Peterflkcwp: v

'T 0 all whom it may concern:

onrrnn STATES PATENT F I rn'rnn sHAnr, or PERTH, sco'rnAm).

MEANS FOR s'rorrine THE DELivnRY or Bovine 11v SPINNING-MACHIN'ES.

Patented M an 1919.

Application filed February 4, 1919. Serial No. 275,016. 7

Be it known that 1, PETER SHARP, .of Perth, Scotland, spinner, a subject of the King of Great Bn'tain and Ireland, have invented certain new and useful Improvementsin and Relating to Means for Stop-v Rovlng 1n Spinning following is a spec1-- ping the Delivery of Machines, of which the fication.

This invention relates to a rove stop for spinning machines and primarily embodies improved stop mechanism adapted for dry or wet spinning and for, various kinds of fibers, such as those of jute, flax, tow, hemp, cotton and other materials.

It has been previously proposed to provide means both mechanically and electrically controlled or operated for shifting the rove out of the pass of the feed-rolls upon the breakage of the yarn which usually takes place between the drawing-rolls and bobbin 7 and also to lift said rove out of the nip' of the drawing rolls, and further to provide rove stop mechanism which includes a balanced feeler adapted to bear lightly on the thread and to cooperate with some form of mechanism which will stop the feed when the thread breaks, but the majority of said devices involve complicated and intricate mechanism liable to fail or get out of'order at critical moments.

According to this invention I provide'an improved mechanically controlled automatic rove stop of extremely simple construction having a minimum number of parts and one of such efliciency as to practically guarantee correct operation under all conditions and at alltimes. V

The primary feature of the invention lies in the combination with such a substantially balanced feeler, of a gravity operated member which cooperates with the feeler in such a manner that on breakage of the thread, the feeler energizes and then releases said gravity member, and the latter acts to release or permit actuation of an element for rove to non-feeding position. A further feature of the invention comprises novel mechanism co-acting with the feeler and gravity member whereby the rove shifting the .shifting member is released and on return to scribed and specifically pointed outin appended claims.

A practical embodiment of the invention which is applicable to any conventional type of spinning machine, is represented'in the accompanylng drawings 'in which Figure 1 is a sectional side elevation ofthe mechanism in normal position; Fig. :2 is a front elevationlof same; Fig. 3 is a similar v'iewto Fig. 1, showing the position of the parts of l the mechanism after breakage of the thread; Fig. 4c is a partial front view of Fig. 3. Fig. 5 is a perspective detail view on an enlarged scale, Fig. 5 is a plan view of a catch and associated elements, parts being broken away, and Figs. 6 to 9 other detail views ofparts hereinafter referred to.

The rove shifting member is in the form of an arm or lever 1 pivoted, as at 2 inthe upper plate 3 of a casing 3 inclosingthe. mechanism and provided at its outer end with a rove guide t and rove threading device a all disposed aboveor adjacent the feed-rolls 5, each ofwhich is provi'dedwith a toothed or serrated peripheral portion 6', and one or both having a circumferential groove 7. The lever 1 is adapted, in the" manner hereinafter described, to move about its .pivot 2 and swing the rove m which passes through the rove-guide from between the nip or serrated parts 6 of said feed-rolls, in which it is shown in Figs. 1 and 2, into the circumferentially grooved part 7 of said rolls as indicated in Figs. 3 and at where no traction is exerted on the rove. Below the feed-rolls is disposed a pair of drawing rolls 8 and the flier 9, with bobbin 9*, and between v these two last mentioned elements a convenient part of a feeler or the like 10 bears on the thread 00 extendingbetween said'drawing rolls and flier.

The general construction so far described is common to many fdrms of rove-stop mechanism but to now. turn tothe characteristic features of the present invention. The aforesaid feeler is in the form of a rod 11 having at its lower end a curved finger 12 which bears upon the thread, the rod being freely pivoted at 12 inbearings-13 in. the casing 3 and its opposite end being bent within the casing and provided with a pivoted trip 14 (see also Fig. 6) having an an-.

gular nose 15 and under the action of a of a stop-pin 17 The construction and.

mounting of the feeler rod is such that it is substantially balanced and exerts only a very slight pressure on the thread.

The said nose 15 of the trip 14: normally engages "under a slide or plate 18 (see also Fig. 8) projecting laterally from the lower end of a weight 19 freely suspended in the casing on'a pivot pin 20 (see also Fig. 5), said weight being provided adjacent it's pivot with a laterally projecting pin 21, adapted to bear against one arm-of a trigger 22 freely pivoted on a stud 23, the other arm of said trigger engaging a catch 24 under the action of a spring-25 and having a shoulder 26 which under normal conditions engages behind a snag 27 depending from the rove-shifting lever 1, whereby the latter is maintained in the operating or feeding position shown in Figs. 1 and 2. The aforesaid weight 19 is also provided with a second abutment 28, having an inclined and shouldered face 29 and which cooperates with the lower end of a weighted tumbler 30, pivoted at the side of the casing on a stud 30 in a plane at right angles to the weight 19. The upper end of said tumbler coacts with a finger 31 on the end of a gravity trip 32 pivoted at 33 to the inner end of the rove-shifting lever 1 for a purpose hereinafter explained.

The operation of the mechanism so far described is as follows When the thread m breaks, the feeler-rod 11 is released, and its lower member swings down by gravity about the pivot 12 its upper member at the same time being raised. This movementof the feeler-rod causes the nose 15 of the spring trip 14 to slide along the under face of the weight plate 18 (see position Fig. 1) and rocks the weight 19 about its pivot 20 to the left, or in other words lifts same, and during this movement the shouldered face 29 of abutment 28 releases the tumbler 30 so that it falls backward under the influence of its weight free of such abutment. Th lifting of the weight continues until the nose 15 slips off the end of said plate 18, whereupon the weight 19 swings back to the right, to the position shown in Fig. 3 and the pin 21 acts against the trigger 22 which in turn releases the spring catch 24: from the snag 27 on lever 1, thus allowing the latter to be swung sharply into inactive or non-feeding position under the action of a spring 34 which bears on the rear of the lever. The rove-shifting lever 1 on being thus released forces the rove an over and immediately said rove is clear of the serrated part 6 of the feed-rolls, and passes into the grooved part 7 thereof the rove en gages a toothed or roughened projection 35 (see Fig. 7 on the .outer end of the topplate 3 of the casing 5 (Fig. 8), so that a bend, deflection or equivalent is formed in the rove as shown in Fig. 4, which causes same to be slightly lifted out of the nip of the drawing rolls if the break has taken place close thereto.

When the operative desires to piece the thread m the latter is'taken up from the bobbin 9 in the usual way and when ready to allow the rove to be again fed by the feedrolls the lever 1 is moved back by hand into operating or feeding position where it will be held to continue the feeding by the reengagement of the shoulder 26 of the spring catch 24 with the snag 27 of said lever and by the weight 19 being held against active movement by the weighted tumbler 30 above mentioned, this latter, operation being performed by means of the trip finger 31 on the lever 1 forcing forward the upper endof the tumbler, the lower end of which consequently cooperates with the inclined face 29 of the weight abutment 28 to return the weight to normal position and then engages behind the shoulder of said inclined face 29, thus look ing the weight in said normal position.

When the operative has pieced the thread :0 and again moved the feeler finger 12 into engagement therewith, the nose 15 of the spring-trip 14 will rengage under the plate 18 of the weight 19, moving same sufficiently to release the tumbler 30, all the parts being thus returned to original positions ready to act in the manner above described should the thread again break.

The aforesaid plate 18 may with advantage be made slightly curved at its ends in opposite directions, as shown in Fig. 8, being curved upward at the right hand end as at 36 to assist the sliding off of the nose l5 and curved downward at its left hand end as at 37 to bring the nose, and consequently the feeler, to rest. Such a formation will render the mechanism extremely sensitive and produce more definite swing of the weight and consequent sharp movement of the lever 1.

When the motion of the spinning frame is stopped for removing the full bobbins and placing empty ones in position, or for other reason, I may provide means for putting the rove-shifting mechanism out of action or locking same and the means shown in the drawings for the purpose comprises a cam 40, shown at the back of the mechanism, adapted to act on a spring plunger 41 which extends through the casing 3 and engages any suitable part of the mechanism, the part in the present instance being the weighted tumbler 30, the plunger making contact with the curved face 30 thereof, thus preventing it from becoming released from the weight abutment 28, and consequently locking the weight and all other cooperating parts, it being understood that the top of the tumbler 30 drops back, or swings clockwise in Fig. 6, which is prevented by plunger 41 being disposed in adanism would come into vance of the face 30*. It will be understood that one of said cams 40 and plungers 41 is provided for each spindle, and corresponding rove-shifting mechanism on the spinning frame and all are capable of being actuated at the same time by mounting the cams on a shaft 4:2 extending across the frame and capable of being manually operated to hold the mechanism inactive until the operative effects release by moving the feeler rod 11 in a reverse direction or to the left as far as it will extend, (a spring 43 being provided to prevent straining of the feeler) and then allowing its finger 12 tomengage the thread whereupon the mechanism is again ready for operation.

The cam motion above described is only for use when the frame is stopped, as otherwise the feeler in moving back and the thread being disengaged, all the stop motion mechoperation.

A second cam motion (one for each spindie and capable of simultaneous operation when the frame is re-started) may also be provided, such motion being shown as comprising a shaft M on which is mounted a cam 45 acting on the forked end of a double armed lever 46 pivoted at f? to a suitable support. (not shown), the other arm of said lever carrying a grooved roller 48 which engages the feeler rod 11. The purpose of this motion is to move all the feelers past their normal position to that indicated in broken lines in Fig. 1 and then allow them to return to reengage the threads, thus dispensing with the usual operation in which the operative has to separately handle and move the feeler rods to bring them into desired position before re-starting the frame.

I also propose to dispense with the usual separate thread-plate or guide between the drawin rolls and the flier and to produce this guide by means of an eye formed at a convenient position on the feeler for instance at the outer end of the finger 12 thereof as shown at 50 in Fig. 9 the thread passing through said eye so that when the thread breaks the action of the mechanism will be the same as above described.

I do not limit myself to the exact construction arrangement or combination of parts above described and illustrated in the accompanying drawings since the same may be varied within limits prescribed by the appended claims without departing from the spirit of the invention.

What I claim as my invention and desire to secure by Letters Patent of the United States is:--

1. Rove stop mechanism comprising in combination a rove shifting element normally in rove feeding position, a balanced feeler adapted to bear on the thread and a gravity operated member, the latter and the feeler being adapted to cooperate whereby a spring catch normally on breakage of the thread, the gravity memher is first lifted by the feeler and then released therefrom, said gravity member then acting to permit actuation of the rove shifting element to non-feeding position.

2. Rove stop mechanism comprising in combination a pivoted rove shifting memher, a substantially balanced feeler adapted to bear at one end with a minimum of pressure on the thread, a gravity operated weight cooperating with the opposite end of said feeler, said weight being firstlifted by the feeler and then released therefrom, and means adapted to hold the rove-shifting member normally in feedingv position, said means being actuated by the weight on breakage of the thread to permit movement of said shifting member to non-feedingposition.

3.Rove stop mechanism comprising in combination a spring actuated rove shifting member, a balanced feeler adapted to bear on the thread, a gravity operated weight adapted to be first lifted by said feeler and then released therefrom, trigger mechanism between member and engageable by the weight and holding said member in feeding positionagainst the action of its actuating spring, said trigger mechanism and. spring catch cooperating under the action of the weight on breakage of the thread to release the shifting member and permit it to move to non-feeding position.

4. Rove stop mechanism for spinning the'weight and shifting V foo machines comprising in combination a rovegravity member to permit said rove-shifty ing member s1t1on.'

5. Rove stop mechamsmfor spinning mato move to the non-feeding po- Hchines comprlsing 1n combination a roveshifting member normally in rove-feeding position, a balanced feeler adapted to bear on the thread, a gravity operated member cooperating with the feeler and adapted-to be first raised thereby and then released therefrom and a locking device for said gravity operated member including a loaded tumbler adapted on energization of the gravity operated member by the feeler on breakage of a gravity member to permit said rove-shifting member to move to non-feeding position, said tumbler also serving to restore the gravity member to normal position when the thread to release the said v rove-shifting member is returned to feeding position.

6. Rove stop mechanism comprising in combination a rove-shifting member, a substantially balanced feeler adapted to hear at one end with a minimum of pressure on the thread, a trip device at the opposite end of said feeler, a gravity operated weight having means cooperatin with the trip device on the feeler where Y on breakage of the thread the weight i first lifted by the feeler and then released therefrom, and means adapted to hold the rove shifting member in feeding position, said means being actuated by the weight to permit movement of the shifting member to non-feeding position.

7. Rove stop mechanism comprising in combination a rove shifting member, a substantially balanced feeler adapted to bear at one end with a minimum of pressure on the thread, a trip device at the opposite end of said feeler, a. gravity operated weight, a plate on said weight cooperating with the trip device on the feeler, and having oppositely curved ends to assist the sliding off of the trip device at one end and retard its sliding movement at the other end, such weight on breakage of the thread being first lifted by the feeler and then released there from and means adapted to hold the rove shifting member in feeding position,v said means being actuated by the Weight on its release to permit movement of said member to non-feeding position.

8. Rove stop mechanism comprising in combination a rove-shifting member normally in rove feeding position, a balanced feeler adapted to bear on the thread, a gravity operated member cooperating with the feeler whereby on breakage of the thread the feeler first lifts and then releases said gravity member and the latter then acts to cause movement of the rove shifting memher to non-feeding position, and means for rendering the aforesaid mechanism inoperative on stoppage of the machine, comprising a cam motion and a spring plunger applied to part of the mechanism.

Copies of this patent may be obtained for five cents each, by addressing the 9. In a rove stop mechanism for the spindles of spinning machines, the combination of a rove shifting member normally in rove feeding position, a balanced feeler adapted to bear on the thread, a gravity member cooperating with the feeler whereby on breakage of the thread the rove shifting member may be moved to non-feeding position, means applied to each spindle of the machine for rendering the rove stop mechanism inoperative on stoppage of the machine, comprising a cam-motion and a spring plunger applied to part of the mechanism, and devices for actuating all said last mentioned means simultaneously.

10. In a rove stop mechanism for the spindles of spinning machines the combination of a rove shifting member normally in rove feeding position, a balanced feeler adapted to bear on the thread, a gravity member cooperating with the feeler whereby on breakage of the thread the rove shifting member may be moved to non-feeding position, and means for shifting a plurality of feelers in a machine beyond normal position and then allowing them to return :to rengage the threads, said means comprising a separate cam motion for each spindle and devices for actuating all said cam motion simultaneously.

11. In a rove stop mechanism the combination of a rove shifting member normally in rove feeding position, a balanced feeler having at one end a thread guide in the form of an eye, and a gravity operated member cooperating with the opposite end of the feeler whereby on breakage of the thread the feeler first lifts and then releases said gravity member and the latter acts to cause movement of the rove shifting member to non-feeding position.

In witness whereof I have signed this specification in the presence of two witnesses.

PETER SHARP.

lVitnesses ALLAN BAXTER, SUSAN H. S. Low.

Commissioner of Patents,

Washington, D. G. 

